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40' @ .434 per foot in height adds to just over 17, incoming is 60.Assuming max psi in your code is 80, you could get away with a booster and not have to use prv's on the lower floor.I'm guessing your customers just not happy with flow on the top floor, it's just about 43 psi.

40' @ .434 per foot in height adds to just over 17, incoming is 60.Assuming max psi in your code is 80, you could get away with a booster and not have to use prv's on the lower floor.I'm guessing your customers just not happy with flow on the top floor, it's just about 43 psi.

You know how it is Ducky. You get a bunch of DINKS with bathrooms bigger than my bedroom. They all wanted champagne ceiling mounted dinner plate size showerheads. The problem only exists during peak usage. All other times it's adequate

You know how it is Ducky. You get a bunch of DINKS with bathrooms bigger than my bedroom. They all wanted champagne ceiling mounted dinner plate size showerheads. The problem only exists during peak usage. All other times it's adequate

Unit

Oops, I stand corrected, you need a 40psi boost, with prvs all over the place in the first two floors.

You know how it is Ducky. You get a bunch of DINKS with bathrooms bigger than my bedroom. They all wanted champagne ceiling mounted dinner plate size showerheads. The problem only exists during peak usage. All other times it's adequate

Unit

Best we can do on my end is have a pump number with amps and GPM's tommorrow.It's too late for my loop.

Comment

Just for the record.The three phase VFD's don't need a tank,just a bladder.The system is digitally controlled to only pump usage.It ramps up based on demand(1 shower or all 35 units) versus full on/full off for 1 shower.

Comment

I am not disagreeing with dirtyhands on the use of a pump with a VFD. However, a VFD can only ramp down so far. I would look into a duplex or triplex (probalby just a duplex) system with PRV's on the lower floors if deemed necessary.